Stuck booting

Okay, I downloaded couple things from cydia, added them to a que, and installed. Took a while to install, and while reloading the data, it crashed and rebooted, only problem is that, that happened at 6:30. It's 8:11 now. And still at the boot logo. Is there any way to get off this, WITHOUT restoring?
Also, after every 5 minutes or so, it's flashes to a white, then black screen and tries to reboot again. The computer recognizes it.

Okay, I downloaded couple things from cydia, added them to a que, and installed. Took a while to install, and while reloading the data, it crashed and rebooted, only problem is that, that happened at 6:30. It's 8:11 now. And still at the boot logo. Is there any way to get off this, WITHOUT restoring?
Also, after every 5 minutes or so, it's flashes to a white, then black screen and tries to reboot again. The computer recognizes it.